The Effect of Electric Energy Accumulation by Hydrated ZrO2 – Nanoparticles

The dimensional effect of the accumulation of an electric charge with a density of up to 270 μF/g by the system of compacted zirconium dioxide nanoparticles during exposure in an electric field (5000 V/m) under normal physical conditions is determined. Based on a qualitative complex analysis of the forms of appearance of the effect, it is shown that the place of localization of different charge carriers is the surface of nanoparticles. The supposed mechanism of this effect is considered using the theory of dispersed systems, the band theory, and the theory of contact phenomena in semiconductors. It was concluded that this mechanism is due to the phenomenon of localization of electron-type charge nanoparticles in the near-surface zone of the material in contact with the adsorption ion atmosphere. This effect is relevant for modern nanoelectronics, microsystem technology, and printed electronics.

RADIATION STIMULATION OF THE CATALYTIC ACTIVITY OF ZIRCONIUM DIOXIDE NANOPARTICLES DURING THE CONVERSION OF HYDROCARBONS

The comparison of the catalytic activity of the initial and activated by bremsstrahlung -radiation on a high-current electron accelerator of zirconium dioxide nanoparticles on the nature of the conversion of ethanol. The used -activation parameters contributed to the formation of a more perfect crystal structure of ZrO2 nanoparticles. It was shown that when using -activated ZrO2 nanoparticles as a catalyst, the yield of hydrocarbon products during the conversion of ethanol was several times higher than the yield of the same products in the case of using the initial ZrO2 nanoparticles. The mechanism of such a conversion of ethanol can be associated with the synergism of large ionization losses of Auger electrons and the effect of highly reactive products involved in heterogeneous catalysis.

Synthesis, Characterization and USW Sensor of PEO/PMMA/PVP Doped with Zirconium Dioxide Nanoparticles

Piezoelectric phenomena is very important for various applications such as ultrasound waves (USW) sensor and pressure sensors. The raw materials from polyethylene oxide (PEO), Poly(methyl methacrylate)(PMMA) and poly(N-vinyl pyrrolidone) (PVP) polymer blends were doped with 0.02,0.04 and 0.06 wt% from zirconium dioxide (ZrO2) nanoparticles (NPs) as a nanocomposites (NCs). The resultant films were prepared by dry casting method. The optical microscope (OM) and scanning electron microscopy (SEM) were used to satisfied from the SiO2NPs diffusion in the blend. The SiO2NPs were good diffused inside the blend with some weak aggregation happened in the high content of NPs. The composite films were diagnosed by FTIR. The USW properties were measured for k1 spaceman with various frequencies (25,30,…,45) MHz. The USW coefficients were clearly effected by the frequency varied. The resulted composite film was succeeded to be used as USW sensor, also these findings could help to realize these new NCs as promising materials for wide applications, such as backlight, car glass and UV filters.

Assessment of Some Characteristics and Properties of Zirconium Dioxide Nanoparticles Modified with 3-(Trimethoxysilyl) Propyl Methacrylate Silane Coupling Agent

This study presents the results of surface modification of zirconium dioxide (ZrO2) nanoparticles by 3-(trimethoxysilyl) propyl methacrylate silane coupling agent by assessing some characteristics and properties of modified ZrO2 nanoparticles by infrared spectroscopy, thermogravimetric analysis, size distribution, zeta potential, and field emission scanning electron microscopy methods. The modified and unmodified ZrO2 nanoparticles have been used as nanoadditives for organic coatings based on acrylic emulsion resin. The abrasion resistance of acrylic coating was evaluated according to ASTM E968-15. The obtained results show that ZrO2 nanoparticles were functionalized successfully with 3-(trimethoxysilyl) propyl methacrylate silane. The modified ZrO2 nanoparticles exhibit a positive effectiveness in the enhancement of the abrasion resistance of acrylic resin coating compared to unmodified ZrO2 nanoparticles.